Seeking adventure during a school field trip, fifteen kids stumble upon a strange man in a cave, who invites them to play a game. But it turns out, the game is all too real.
It's none of your 
business, Kako-kun.
.هذا ليس من شأنك يا كاكو-كن
Ich wüsste nicht,
was dich das angeht, Kako?
Ça ne te regarde pas, Kako.